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https://issues.apache.org/jira/browse/HAMA-842?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Edward J. Yoon resolved HAMA-842.
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Resolution: Fixed
I've commit this.
> Add persistent queue option to JobConf
> --------------------------------------
>
> Key: HAMA-842
> URL: https://issues.apache.org/jira/browse/HAMA-842
> Project: Hama
> Issue Type: New Feature
> Affects Versions: 0.6.3
> Reporter: Edward J. Yoon
> Assignee: Edward J. Yoon
> Fix For: 0.7.0
>
> Attachments: HAMA-842_v01.patch, HAMA-842_v02.patch
>
>
> By default, incoming (local) queue will be reset in every superstep. It means
> that unconsumed messages will be lost. If this is persistent queue,
> unconsumed messages will be persisted in incoming queue.
> {code}
> public final void clearOutgoingQueues() {
> if (localQueue != null) {
> localQueue.close();
> }
> localQueue = localQueueForNextIteration.getMessageQueue();
> localQueue.prepareRead();
> localQueueForNextIteration = getSynchronizedReceiverQueue();
> notifyInit();
> }
> {code}
> Simply we can add unconsumed messages to localQueueForNextIteration before
> switching local queue.
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